__ is a force provided by engines to push airplane forward through the air（）
A: Lift
B: gravity
C: thrust
D: drag
A: Lift
B: gravity
C: thrust
D: drag
举一反三
- 中国大学MOOC: __ is a force provided by engines to push airplane forward through the air.
- four force on the aircraft are（ ）、（ ）、（ ）and（ ）。 A: lift B: gravity/weight C: trust D: drag
- Before the airplane begins to move, thrust must be exerted. It continues to move and gain speed until thrust and drag are equal. In order to maintain a constant airspeed, thrust and drag must remain equal, just as lift and weight must be equal to maintain a constant altitude. If in level flight, the engine power is reduced, the thrust is lessened, and the airplane slows down. As long as the thrust is less than the drag, the airplane continues to decelerate until its airspeed is insufficient to support it in the air. Likewise, if
- The definition of a force is: A: That which causes or tends to cause a change in motion B: Thrust and drag only C: A push D: The result of an applied input
- The _____ of airplane engines announced a coming air raid.